Fluid Mosaic Model

• Phospholipid Bilayer - Fluid Mosaic Model

  2 layers of phospholipid molecules - phosphate head, 2 lipid tails

  lipid tails = hydrophobic

  phosphate head = hydrophilic

  heads facing outwards towards the water, tails facing inwards away from the water

  Within the bilayer, there are carbohydrates, cholesterol and proteins
• Carbohydrates - Fluid Mosaic Model

  Glycoprotein if connected to protein

  Glycolipid if connected to lipid

  Never attached to phosphate
• Cholesterol - Fluid Mosaic Model

  Embedded within phospholipid bilayer
• Proteins - Fluid Mosaic Model

  Integral = permanent, deeply imbedded

  Peripheral = temporary, attached on the outside
• Fluid Mosaic Model Functions

  (Eu and pro) Separates contents of cell from external environment — intercellular fluid (cytoplasm), extracellular fluid (watery environment outside cell)

  (Eu) creates organelles in cell

  Regulates contents of cell - able to control which substances go through — semi-permeable

  Involved in cell recognition and communication — glycoproteins, glycolipids, integral proteins
• Fluidity in the Fluid Mosaic Model

  The property that allows the membrane to adapt its shape and movement to different conditions

  Cholesterol, phospholipids, proteins and carbohydrates contribute to fluidity